17/06/2022 13:23:59

Drive Unit Inverter Diode Test

Correction code NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. To provide feedback on FRT values, email LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure proper PPE is worn when performing the below procedure.

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Warning
This procedure is a DRAFT, although it has been validated. Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near high voltage systems and components. Provide corrections and feedback to ServiceDevelopment@teslamotors.com.

Procedure

  1. If the diode test is being performed on a drive unit inverter that is readily accessible, skip to step 9.
  2. Move the vehicle to a 2 post lift. See Raise Vehicle - 2 Post Lift.
  3. Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
  4. Disconnect LV power. See LV Power (Disconnect and Connect).
  5. Remove the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  6. Perform the vehicle electrical isolation procedure. See Vehicle Electrical Isolation Procedure.
  7. If the front drive unit inverter is to be tested, remove the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
  8. Slide the red connector locking tab, open the black release lever, and then disconnect the respective drive unit inverter's HV harness from the HV battery.
  9. Set the multimeter to diode test.
  10. If the drive unit inverter is readily accessible, touch the red positive probe of the multimeter to the B- terminal of the drive unit inverter HV header, and the black negative probe of the multimeter to the B+ terminal of the drive unit inverter HV header.
  11. Alternatively, touch the red positive probe of the multimeter to the B- terminal of the HV harness, and the black negative probe of the multimeter to the B+ terminal of the HV harness.
  12. Record the measured voltage drop as displayed on the multimeter into a Toolbox session for later use.
    Informational PurposesAn informational icon, calling your attention
    Note
    If "OL" or a value greater than 2.0 is displayed on the multimeter, reverse the probes and measure again.
  13. Use the following information to determine if the voltage drop is acceptable:
    • MOSFET type inverter: 1.0 - 2.0 V
    • IGBT type inverter: 0.45 - 2 V
  14. If the drive unit inverter is readily accessible, return to the procedure that requested a drive unit diode test.
  15. Verify that the black release lever of the drive unit inverter HV harness connector is in the open position, install the connector flat and square to the HV battery drive unit HV header, secure the release lever to the closed position, and then slide the red connector locking tab.
  16. If the front drive unit inverter was tested, install the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace).
  17. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  18. Connect LV power. See LV Power (Disconnect and Connect).
  19. Install the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
  20. Remove the vehicle from the 2 post lift. See Raise Vehicle - 2 Post Lift.